Message type: E = Error
Message class:  CNV_20200_CHECK - Messages for check functions (company code merge) 
Message number: 231
Message text: No securities account group mapping provided
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message CNV_20200_CHECK231 indicates that there is an issue with the mapping of securities account groups during a data migration or conversion process, typically related to the SAP S/4HANA migration or similar projects. This error suggests that the system is unable to find a mapping for the securities account group, which is necessary for the conversion process to proceed.
Cause: Missing Mapping Configuration: The primary cause of this error is that the required mapping for securities account groups has not been defined in the system. This could happen if the configuration steps were skipped or not completed during the setup of the migration project. Incorrect Data: There may be incorrect or incomplete data in the source system that does not match the expected securities account groups in the target system. Customizations: If there are custom securities account groups that are not accounted for in the mapping, this can lead to the error.
Solution: Define
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_20200_CHECK230 All provided source values for the securities account mapping exist
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_20200_CHECK229 Source securities account (CoCd &1, SecAcct &2) does not exist
What causes this issue?  Source securities account (company code &V1&, securities account &V2&) does not exist.System Response  ErrorH...
CNV_20200_CHECK232 Source securities account group (CoCd &1, AccGrp &2) with missing target
What causes this issue?  Source securities account group (company code &V1&, securities account group &V2&) with missing target value....
CNV_20200_CHECK233 Source value missing for (CoCd &1, new AccGrp &2)
What causes this issue?  Source value missing for (company code &V1&, new securities account group &V2&).System Response  ErrorHow to ...
Click on this link to search all SAP messages.